Tube.



W. P. MURPHY.

TUBE.

APPLICATION FILED JUNE 12, 1908.

Patented Apr. 27, 1909.

INVENTO/i WI THE 885 8 Mem AT RIVEY I, UNITED STATES PATENT OFFICE.

WILLIAM F. MURPHY, or NEW YORK, N Y, ASSIGNOR T CAROLINE o. PRINCE,

' or new YORK, N. Y.-

some,

Specification of Letters Patent.

Patented April 27, 1909.

Application filed June 12, 190B. Serial No. 488,047.

,To all whom 'it may comm:

Be it known that 1, WILLIAM F. MURPHY,

a citizen of the United States, and resident of Tompkinsville, borough of Richmond, in

the city of New York, county of Richmond,

and State of New York, have invented certain new and useful Improvements in Tubes, of which the following is a specification.

My invention relates to improvements in 0 tubes and particularly to that class of flexible inner tubes for use in inflated tires for automobiles and other vehicles. I

The object of my invention is to provide a strongand durable flexible tube. I ac- 5 complish this object by the device illustrated in the accompan'y' g drawing whichshows a perspective view of the device.

I form my tube body preferably of one or more layers of" woven partially elastic I fabric 1 and 2' and a flexible composition preferably rubber or rubber compound 3 which is forced into the meshes of the fabric in any well known manner and which also forms an outer and an inner covering for the fabric. This construction has considerably greaterstrength than the layer or layers of rubber alone, thatare ordinarily used in'tubes for inflated tires. While this construction possesses some elasticit or ability to stretch, 'yet to provide or a- 'greater amount of stretchin both laterally and longitudinally so that te tube may in all cases expand to fit the outer casi I rovide that the longitudinal edges of this fa rm 1, 2 do not overlap or meet at the inner side of the tube but are separated by a suitable distance, and thelongitudinal'elasticsection constructed of rubber 4 of the tube from edge to edge of the fabric is composed of a' suitable flexlble elastic material such as rubber or rubber composition which may be the same material which forms the inner and the outer faces of thetube, of the same or increased thickness. It is desirable that this lon 'tudinal section 4.- be of such width that w en stretched the edges of the fabric do not go beyond the marginal edges of the rim. Y

I find that by the construction above described,greater strength and durability is obtained than inthe devices now in use, as

the section or part of the tube which bears "the greatest strain is not. weakened by stretching when the tire is inflated and a proper seat is also obtained for the valve 5. Having thus described my invention what I claim is:

'An inner tube for pneumatic tires constructed of an elastic material solel section nearest the rim of the W1 1 and woven partially elastic fabric combined homo eneously for the remaining portion and a a ted to exnd and contract laterally an longitudinally when inflated to completely fill under pressure the outer casing, substantially as shown and described. a

Signed at the city of New York in the county this second day of June A. D. 1908.

WILLIAM F. MURPHY.

M. man ELmNon Qoimr.

at that eel and of New York and State of New York 

